[deliverable/linux.git] / drivers / pinctrl / pinctrl-utils.c

/*
 * Utils functions to implement the pincontrol driver.
 *
 * Copyright (c) 2013, NVIDIA Corporation.
 *
 * Author: Laxman Dewangan <ldewangan@nvidia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307, USA
 */
#include <linux/device.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/of.h>
#include <linux/slab.h>
#include "core.h"
#include "pinctrl-utils.h"

int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
		struct pinctrl_map **map, unsigned *reserved_maps,
		unsigned *num_maps, unsigned reserve)
{
	unsigned old_num = *reserved_maps;
	unsigned new_num = *num_maps + reserve;
	struct pinctrl_map *new_map;

	if (old_num >= new_num)
		return 0;

	new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
	if (!new_map) {
		dev_err(pctldev->dev, "krealloc(map) failed\n");
		return -ENOMEM;
	}

	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));

	*map = new_map;
	*reserved_maps = new_num;
	return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);

int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
		struct pinctrl_map **map, unsigned *reserved_maps,
		unsigned *num_maps, const char *group,
		const char *function)
{
	if (WARN_ON(*num_maps == *reserved_maps))
		return -ENOSPC;

	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	(*map)[*num_maps].data.mux.group = group;
	(*map)[*num_maps].data.mux.function = function;
	(*num_maps)++;

	return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);

int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
		struct pinctrl_map **map, unsigned *reserved_maps,
		unsigned *num_maps, const char *group,
		unsigned long *configs, unsigned num_configs,
		enum pinctrl_map_type type)
{
	unsigned long *dup_configs;

	if (WARN_ON(*num_maps == *reserved_maps))
		return -ENOSPC;

	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
			      GFP_KERNEL);
	if (!dup_configs) {
		dev_err(pctldev->dev, "kmemdup(configs) failed\n");
		return -ENOMEM;
	}

	(*map)[*num_maps].type = type;
	(*map)[*num_maps].data.configs.group_or_pin = group;
	(*map)[*num_maps].data.configs.configs = dup_configs;
	(*map)[*num_maps].data.configs.num_configs = num_configs;
	(*num_maps)++;

	return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);

int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
		unsigned long **configs, unsigned *num_configs,
		unsigned long config)
{
	unsigned old_num = *num_configs;
	unsigned new_num = old_num + 1;
	unsigned long *new_configs;

	new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
			       GFP_KERNEL);
	if (!new_configs) {
		dev_err(pctldev->dev, "krealloc(configs) failed\n");
		return -ENOMEM;
	}

	new_configs[old_num] = config;

	*configs = new_configs;
	*num_configs = new_num;

	return 0;
}
EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);

void pinctrl_utils_free_map(struct pinctrl_dev *pctldev,
	      struct pinctrl_map *map, unsigned num_maps)
{
	int i;

	for (i = 0; i < num_maps; i++) {
		switch (map[i].type) {
		case PIN_MAP_TYPE_CONFIGS_GROUP:
		case PIN_MAP_TYPE_CONFIGS_PIN:
			kfree(map[i].data.configs.configs);
			break;
		default:
			break;
		}
	}
	kfree(map);
}
EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);
Commit	Line	Data
1eb207a9 LD	1	/*
	2	* Utils functions to implement the pincontrol driver.
	3	*
	4	* Copyright (c) 2013, NVIDIA Corporation.
	5	*
	6	* Author: Laxman Dewangan <ldewangan@nvidia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation version 2.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
	13	* whether express or implied; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	* 02111-1307, USA
	21	*/
	22	#include <linux/device.h>
2f62eb9d	23	#include <linux/export.h>
1eb207a9 LD	24	#include <linux/kernel.h>
	25	#include <linux/pinctrl/pinctrl.h>
	26	#include <linux/of.h>
	27	#include <linux/slab.h>
	28	#include "core.h"
	29	#include "pinctrl-utils.h"
	30
	31	int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
	32	struct pinctrl_map *map, unsigned reserved_maps,
	33	unsigned *num_maps, unsigned reserve)
	34	{
	35	unsigned old_num = *reserved_maps;
	36	unsigned new_num = *num_maps + reserve;
	37	struct pinctrl_map *new_map;
	38
	39	if (old_num >= new_num)
	40	return 0;
	41
	42	new_map = krealloc(map, sizeof(new_map) * new_num, GFP_KERNEL);
	43	if (!new_map) {
	44	dev_err(pctldev->dev, "krealloc(map) failed\n");
	45	return -ENOMEM;
	46	}
	47
	48	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
	49
	50	*map = new_map;
	51	*reserved_maps = new_num;
	52	return 0;
	53	}
	54	EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
	55
	56	int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
	57	struct pinctrl_map *map, unsigned reserved_maps,
	58	unsigned num_maps, const char group,
	59	const char *function)
	60	{
	61	if (WARN_ON(num_maps == reserved_maps))
	62	return -ENOSPC;
	63
	64	(map)[num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	65	(map)[num_maps].data.mux.group = group;
	66	(map)[num_maps].data.mux.function = function;
	67	(*num_maps)++;
	68
	69	return 0;
	70	}
	71	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
	72
	73	int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
	74	struct pinctrl_map *map, unsigned reserved_maps,
	75	unsigned num_maps, const char group,
	76	unsigned long *configs, unsigned num_configs,
	77	enum pinctrl_map_type type)
	78	{
	79	unsigned long *dup_configs;
	80
	81	if (WARN_ON(num_maps == reserved_maps))
	82	return -ENOSPC;
	83
	84	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
	85	GFP_KERNEL);
	86	if (!dup_configs) {
	87	dev_err(pctldev->dev, "kmemdup(configs) failed\n");
88	return -ENOMEM;
89	}
90
91	(map)[num_maps].type = type;
92	(map)[num_maps].data.configs.group_or_pin = group;
93	(map)[num_maps].data.configs.configs = dup_configs;
94	(map)[num_maps].data.configs.num_configs = num_configs;
95	(*num_maps)++;
96
97	return 0;
98	}
99	EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
100
101	int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
102	unsigned long *configs, unsigned num_configs,
103	unsigned long config)
104	{
105	unsigned old_num = *num_configs;
106	unsigned new_num = old_num + 1;
107	unsigned long *new_configs;
108
109	new_configs = krealloc(configs, sizeof(new_configs) * new_num,
110	GFP_KERNEL);
111	if (!new_configs) {
112	dev_err(pctldev->dev, "krealloc(configs) failed\n");
113	return -ENOMEM;
114	}
115
116	new_configs[old_num] = config;
117
118	*configs = new_configs;
119	*num_configs = new_num;
120
121	return 0;
122	}
123	EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
124
d32f7fd3	125	void pinctrl_utils_free_map(struct pinctrl_dev *pctldev,
1eb207a9 LD	126	struct pinctrl_map *map, unsigned num_maps)
	127	{
	128	int i;
	129
3287c240 LD	130	for (i = 0; i < num_maps; i++) {
	131	switch (map[i].type) {
	132	case PIN_MAP_TYPE_CONFIGS_GROUP:
	133	case PIN_MAP_TYPE_CONFIGS_PIN:
1eb207a9	134	kfree(map[i].data.configs.configs);
3287c240 LD	135	break;
	136	default:
	137	break;
	138	}
	139	}
1eb207a9 LD	140	kfree(map);
1eb207a9 LD	141	}
d32f7fd3	142	EXPORT_SYMBOL_GPL(pinctrl_utils_free_map);